diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index f6dbc31..e99eda0 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -2,6 +2,7 @@
 /* Tuple object implementation */
 
 #include "Python.h"
+#include "accu.h"
 
 /* Speed optimization to avoid frequent malloc/free of small tuples */
 #ifndef PyTuple_MAXSAVESIZE